SN4 ""

No	Pattern	Freq
1	has been [vb pp] by [det]	223
2	have been [vb pp] by some	145
3	had been [vb pp] by [det]	130
4	have been [vb pp] by [det]	106
5	have been [vb pp] by [det]	88
6	have been [vb pp] by many	77
7	have been [vb pp] by this	59
8	have been [vb pp] by another	47
9	have been [vb pp] by several	46
10	have been [vb pp] by those	33
11	have been [vb pp] by all	27
12	have been [vb pp] by such	27
13	have been [vb pp] by any	23
14	have been [vb pp] by that	22
15	have been [vb pp] by these	21
16	to have been [vb pp] by [det]	21
17	have been [vb pp] by both	19
18	have been [vb pp] by most	16
19	having been [vb pp] by [det]	13
20	have been used by [det]	13
21	have been seen by [det]	12
22	have been adopted by [det]	10
23	have been joined by [det]	8
24	have been influenced by [det]	8
25	have been made by [det]	8
26	have been [vb pp] by former	8
27	have been caused by [det]	8
28	have been suggested by [det]	7
29	have been taken by [det]	7
30	have been [vb pp] by half	7